铸造技术2016，Vol.37Issue(7)：1329-1332,4.DOI:10.16410/j.issn1000-8365.2016.07.001
Mg含量对汽车发动机缸体用Al-Si-Cu合金微观组织和力学性能的影响
Effect of Mg Content on Microstructure and Mechanical Properties of Al-Si-Cu Alloy for Automobile Engine Cylinder
摘要
Abstract
Al-Si-Cu alloys with different Mg contents for automobile engine cylinder were obtained by melting,the effect of Mg content on the microstructure and mechanical properties of the alloy was studied.The results show that adding a certain amount of Mg in the alloys can significantly improve the tensile strength,hardness of as-cast and T6-state alloys,improve the mechanical properties of the alloy.With the increase of Mg content,Mg2Si phase appear in the alloys,which reinforces the tensile strength and yield strength of the alloy.However,excessive Mg element will not be all dissolved,resulting in coarser Mg2Si brittle phase,it can reduce the tensile strength and hardness.The optimum mechanical property of test alloy can be obtained when adding 0.4％ Mg.With the increase of cooling rate,the tensile strength,yield strength and hardness of the alloy increase.关键词
汽车发动机缸体/Al-Si-Cu合金/微观组织/力学性能Key words
automobile engine/Al-Si-Cu alloy/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
张素芬..Mg含量对汽车发动机缸体用Al-Si-Cu合金微观组织和力学性能的影响[J].铸造技术,2016,37(7):1329-1332,4.基金项目
北华航天工业学院青年基金资助项目(KY-2014-14) （KY-2014-14）
廊坊市科技计划资助项目(2015011023) （2015011023）
